Counter-shaft with changeable speed.



PATENTBD NOV. 22, 1904. G. LANGBN.

GOUNTER SHAFT WITH CHANGEABLE SPEED.

APPLICATION FILED JAN. 13, 1904.

N0 MODEL.

ILM.

f @W @f @Qwfg lll/ll llllll/ ll/lh 'llll No. 775,372. Patented November 22, 190e.

UNITED STATES PATENT OFFICE.

GEORGE LANGEN, OF CINCINNATI, OHIO, ASSIGNOR TO THE CINCINNATI PLANER COMPANY, A FIRM OF CINCINNATI, OHIO, AND A CORPORA- TION OF OHIO.

COUNTER-SHAFT WITH CHANGEABLE SPEED.

SPECIFICATION forming part of Letters Patent N O. 77 5,372, dated Novembei` 22, 1904.

Application filed January 13, 1904. Serial No. 188,847. (No model.)

T ff/U "17mm t ma?! UUUGWW is merely driving the loose pulley of the other 50 Be it known that I, GEORGE LANGEN, a citiset, which position is reversed at the end of zen of the United States, residing' in the city each sti'oke, the belt driving being shifted of Cincinnati, in the county of Hamilton and from the tight pulley onto its loose mate,

State of Ohio, have invented a certain new and while the other belt engages the tight pulley useful Counter-Shaft with Changeable Speed; in the other set. It will now be seen that the 55 andI do declare the following' to bea clear, full, carriage is driven with two speeds--a slower and exact description thereof, attention being' one when the cai'riagc is on its forward or called to the accompanyingdrawings, with the cutting' stroke and a higher one when the carro reference characters marked thereon, which riage is returned again after this stroke. As

form also a part of this specification. to this latter speed, no work being' done on it, 60

This invention relates to means whereby the the conditions never vary, and the same may speed transmitted by a set of pulleys mounted therefore be constant. As to the slowerspeed upon a counter-shaft may be changed from a used for the working' stroke, changes are dehigliei' to a lower one, and vice versa. sirable, since neither the work nor the mate- It relates more particularly to such counterrial ai'e always alike and lightei' work or ma- 65 shafts used for driving machine-tools using' terial cutting' easier may permit the carriage two speedsalternately-a slower one for doing' to travel at a higher speed than if heavier the actual work and a faster one for reverswork is done, therebysaving time and increasing or retui'ning parts again to working poing' the capacity of the inachiiie-tool.

' sition. Conditions best fitting these premises The principal object of my invention is 7O are found in the ciistomai'y planer, where the therefore to provide a counter-shaft whereby work is carried past a stationary ciitting-tool the working pulley of the particular machineby means of a reciprocatingcarriage, the tool tool may be driven at either one of two speeds,

acting' upon the work while the carriage carthe return o1` reversing pulley being' operries the same in one direction, after which the ated in the usual mannerwthat is, at constant 75 work is returned ag'ain to the starting-point, speed which is higher than the working speed.

the tool having' meanwhile been adjusted or The invention consists of the construction fed ahead with reference to the work to take and arrangement of parts whereby this oba new cut. ject is attained and as hereinafter more fully Of the two movements comprisingan operadescribed, and pointed out in the claims, and 8O tion of the carriage the return travel may be as illustrated in the accompanying drawings, the faster one and is usually so, because at in which-- that time no work is done, while the forward Figure 1 is a plan view of a set of pulleys motion or working' travel is necessarily a moiintediipon a counter-shaft and all arranged slower one, since at that time the tool is cutas contemplated by my invention. Fig'. 9. is 85 ting. There is on the planer a pulley for each a vertical elevation, with parts broken away, of these two speedswone to drive the carriage of the devices illustrated in Fig. l, showing forward while the tool cuts and another one also in addition a set of pulleys driven by the 40 to return the carriage again for the next cutcoiinter-shaft shown in Fig. l and which set ting stroke. The pulley driving the cari'iage of pulleys may be the operating-pulleys of a 90 for the cutting' stroke is usually the larger one suitable machinetool-as a planer, for inand rotates slower, while the pulley which restance. Fig'. 3 shows, at reducedscale, an end turns the carriage is smaller and rotates at view of the counter-shaft.

highei' speed. Each of these two pulleys has Referring' now more particularly to Fig. 2,

also a corresponding loose pulley mounted a indicates the tight pulley on the machinealongside of it, the belts being' shifted autotool for operating the parts in one direction matically and so arranged that while one of while active work is being done, said pulley the belts is driving the carriage the other belt being' driven by a belt l() from a pulley A on the counter-shaft, 7) indicating the tight pulley for returning' lthe parts operated by the other pulley, it being for such purpose driven by a belt 11 from a pulley B. No work being done at that time, this operation is at a higher speed than the operation of pulley a. The rotation of one being in reverse direction as against the other, it is necessary that one of the belts be twisted. In the premised condition of parts as shown the machine-tool is doing active work, for which purpose operating-pulley a is driven from pulley A. Pulley B, which reverses the machine-tool, although rotating is not transmitting any motion at that time, since its belt engages the loose mate of pulley 7).

At the end of the active working motion of the machine-tool both belts are automatically shifted, belt 10 sliding onto loose pulley ct and belt 11 passing over onto the tight pulley b, whereby the machine-tool is now reversed.

It will be noted that both pulleys A and B rotate uninterruptedly; but one only transmits motion at the time to the machine-tool and the motions transmitted being in opposite directions.

As generally arranged under present practice,pulley A,hereinafter called the working pulley, and pulley B, hereinafter called the reversing-pulley, are both mounted upon a counter-shaft and4 driven at constant speed from a line-shaft, (not shown,) the difference in speeds to be transmitted by each to the machine-tool being attained by arranging and proportioning correspondingly the relative sizes between the driving-pulleys A and B and the driven ones a and Z), respectively.

The counter-shaft was operated by a tight pulley upon it, connection being' made -to the line-shaft mentioned, a loose. pulley being mounted alongside of it to stop the countershaft when the machine-tool driven by it is not used. This arrangement I retain, 12 being the counter-shaft, Al the/tight pulley, and A2 its loose mate, connection being made to the line-shaft by means of a belt 13. However, instead of rotating the two transmitting-pulleys A and B by means of this counter-shaft on which they are mounted I rotate one only, A in this case, it being for such purpose keyed to such shaft. The other pulley, B, is keyed upon a sleeve 14, loosely mounted upon the counter-shaft. It is rotated by means of a tight pulleyB, a loose one, B2, being also provided alongside of it for use when the counter-shaft is not in operation, both of these pulleys being also mounted upon the same sleeve. Connection is made by means of a belt 15 to the same line-shaft from which pulley A is driven. Since these two pulleys A and B rotate always simultaneously when the counter-shaft is used, to carry out the intended operation of the planer and are both constantly driven from pulleys mounted on the same line-shaft, the fact that pulley B is independently mounted on sleeve 14 is of no further significance as regards the purpose of its mere rotation; but such sleeve is needed as part of the means to carry out the object of my invention, such object, as before stated, being to give the Working pulley A a higher speed when the nature of the work or material permits such, the adjustment for such purpose being had before such particular work is started, after which the operation with reference to pulleys L and on the tool is again the same, only that the speed of pulley t has meanwhile been increased. The first step toward carrying out my invention after providing this sleeve 14 is to cause pulley B to rotate at a speed higher than pulley A', which higher speed is readily obtained by arranging the sizes accordingly between pulley B and its driver on the line-shaft. All that is necessary now is to lock sleeve 14 to counter-shaft 12, belt 13, which drives pulley A', being shifted onto loose pulley A2, as shown in Fig. 1. The arrangement of the adjusting mechanism is such that this locking of the sleeve to the counter-shaft and the shifting of belt 13 occur simultaneously. Such adjustment being accomplished and sleeve 14 locked to the counter-shaft, both rotate now together, the sleeve driven by pulley B rotating pulley B and also shaft 12 with pulley A on it, the difference being, however, that this latter is now driven at the higher speed of pulley B' as transmitted through sleeve 14. This higher speed is practically the speed of reversingpulley B, since all these pulleys rotate now together, receiving motion from the same source-to wit, the higher-'speeded belt-15 and pulley B. However, as transmitted to they planer and received by pulley t on it it is not as high as such reversing speed, due to the proportions' of pulleys A and a; but it is correspondingly higher than before the adjustment and while pulley A was driven by the counter-shaft alone and as the same was rotated. by the slower rotating pulley A'. I proceed now to describe the mechanical means for the adjustment from one speed to another.

As to the means for locking sleeve 14 to counter-shaft 12 any suitable clutch mechanism will serve, locking either positively by mechanical devices or by mere frictional contact. This latter method has here been selected, and of the two complementary members of the clutch mechanism one, 15a, is provided at the end of sleeve 14, while the other, 15b, is mounted on shaft 12. This mounting is in the usual manner and such that by groove and feather, key or spline, the member is connected for rotation to'shaft 12, but free to slide longitudinally thereon to engage the the other clutch member or break contact with it. A forked arm 16, engaging this clutch member i-n a manner which does not interfere with its rotation, as by pins 17 and groove 18, is used for shifting this clutch mem- IOC) ber to operate the clutch. This arm is attached to a shifter-rod 19, slidably supported in arms i1, attached in a suitable manner. By preference they project from the bearings or hangers Q9, which support the countershaft. This shifter-rod ismanipulated by the usual hand-lever 23, connected to it by a couplingI 2a and supported from ceiling 25. 9.6 Q6 are the belt-shifter arms carried by this same rod for the purpose of shifting belt 13.

Q7 Q7 are belt-shifting arms for shifting belt 15. They are carried on a shifter-rod 28, supported like the other one on arms 21 and manipulated by a similar lever Q9, similarly attached and supported.

31 31 are stops to limit the movement of this rod in either direction.

32 represents the keys which hold the tight pulleys.

I will now recapitulate in short the operation and manipulation of the parts for adjusting the counter-shaft to either one of its speeds, the counter-shaft being supposed to be at rest, its belts 13 and 15 being each on their respective loose pulleys A2 and B2 and the general line-shaft being of course in operation. For the usual or slower speed of working pulley A and planer-pulley it belt 13 is shifted onto pulley A by means of lever 23 and belt 15 is shifted onto pulley B by means of lever 29, parts being in a position as shown in Fig. 2. voiking pulley A is driven by pulley A and counter-shaft 12, while reversing-pulley B is driven by pulley B/ and sleeve 14.

For the higher speed of working pulley A and planer-pulley t lever 23 is moved to the position shown in dotted lines in Fig. 2, causing' engagement of the elutch members and shifting belt 13 onto its loose pulley, bringing parts into a position as shown in Fig. .1. Lever Q9 is not manipulated, and belt 15 is left where it was. This manipulation disconneets the counter-shaft from the slower pulley A and locks it to sleeve 14, driven at a higher speed by pulley B.

The working pulley A being tight on the shaft necessarily rotates with it at this higher speed.

The speed of reverslng-pulley B remains the same in either event, it being driven in both cases from sleeve 11. To set the entire counter-shaft at rest from this latter adjustment, it is only necessary to shift belt 15 onto its loose pulley, moving' for such purpose lever 29 to the position shown in dotted lines in 55 Fig. Q.

Having described my invention, Iv claim as newl 1. The combination of aeounter-shaft, a

tight pulley and a loose pulley mounted thereon, a rigidly-attached transmitting-pulley also mounted on the counter-shaft, a sleeve loosely mounted on the counter-shaft, a tight pulley on this sleeve to rotate the same, such pulley being driven at a speed different from the speed of the tight pulley on the counter-shaft, means for detachably lockingthe sleeve to the counter-shaft, a belt-shifter to move the belt from the tight pulley on the counter-shaft onto its loose mate and means whereby these sleeve-looking means and this belt-shifter are operatively connected in a manner so as to move together.

2. The combination of a counter-shaft, a

transmitting-pulley rigidly mounted thereon,

a sleeve loosely carried on the counter-shaft, a transmitting-pnlley rigidly mounted on vthe sleeve, a driving-pulley for the counter-shaft and a driving-pulley for the sleeve, both of them operating at a speed different from each 8O other, a loose pulley for each, means for shifting the belts of these pulleys, mechanism to operatively connect the sleeve to the countershaft to drive the latter from the former, or

to disconnect it therefrom and means to posi- 

